Fix CID 163578 (#1 of 1): Structurally dead code (UNREACHABLE).
The pagemap image would never be closed because of stupid code order in
the original patch (674583f2: criu: page-read: read pagemaps at open time
and keep them in memory).
Fix that.
Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>